Vehicle-wheel.



PATENTED OCT. 2, 1906.

EVS. PULLMAN.

VEHICLE WHEEL.

APPLICATION P1LBD JAN.8.1906.

rinrrnn srarpes* plgrnivr ortica..

HERBERT S. PULLMAN, OF MERIDEN, CONNECTICUT, ASSIGNOR OF ONE- HALF TO RANSOM L. BALDWIN, OF MERDEN, CONNECTICUT.

VEHICLE-WHEEL.

l no. 832,560.

`To @ZZ w/'Lo'm/ it muy con/cern;-

Be it known that I, HERBERT S. PULLMAN, a c1t1zen of the United States, and a resident of Meriden, in the county of New Haven and `the object of my invention is to provide aY wheel of this class with a cushion that while State of Connecticut, have invented a new forabsorbing the shocks and jars incident to the movement of a vehicle over a road; and

serving every purpose in absorbing the shocks or ars shall at the same time be extremely durable in construction, sightly in appear ance, and comparatively cheap in its manufacture and maintenance. One form of device in the use of which these objects may be attained is illustrated in the accompanying drawings, in which Figure l is a view invelevation of a wheel embodying my improvement with parts broken away to show construction. Fig. 2 is a view in-cross-section through the rim on the line of the axis of the pin supporting the radially-disposed roller. Fig. 3 is a like view on a line through the spring-cups. Fig. 4 is a detail view, in crosssection, through the rim of the wheel on line of the axis of the rollers extending between the flanges of the outer run.

In the accompanying drawings the numeral 1 denotes the h ub of the wheel, provided with spokes 2, constructed after any usual form and arranged in any desired mann ner.

The numeral 3 denotes the inner rim, supported on the spokes and secured thereto by any means. In the form shown the hub, spokes, and inner rim are all cast integral each with others.

The outer rim is formed separately from the inner rim and has'a certain limited movement thereon. This outer rim 4 has flanges 5 extending inward from the periphery and on opposite sidesv'the'reo'f. The diameter across the opening inclosed by these lianges is slightly greater than the diameter of the invner rim. A series of spring-cups 6 is located at regular intervals about the outer rim 4 and between the flanges, and a second series of spring-cups 7 is arranged'about the periphery of the inner rim 3. Two pf these spring-cups,

Specification of Letters Patent. Application nea January 8.1906. sain No. 295,043.

Patented oct. 2, 190e.

one from each set or series, form a pair for the reception of the ends of each of the springs 8, which are disposed at regular intervals about the periphery of the inner .rim and which serve .to support in a radial direction what may be termed the inner wheel, consisting of the hub, spokes, and rim 3', hereinbefore described. l

The o ening in each of the springecups is preferably of a size to quite closely embrace the end of a spring, but without binding, and each of. the inner series of cups is beveled, as at 9, on opposite sides' at the-bottom and on the sides in the direction of rotation of the wheel to provide for a free and easy action of the springs in their operation as a cushion to support the inner wheel and the weight to be carried thereby. The cups in each ofthe series are preferably located quite closely toether in order to support each other in the irection of rotation of the wheel; but it is obvious that other means for supporting the cups or each cup may be employed, if desired. Each of the cups 6, in the` outeseries prefer,- ably, quite closely fits the space between the flanges 5.

Roller-supports 10 extend between the flanges 5, these supports being arranged in pairs disposed at equal intervals about the circumference of the outer rim. Any desired number of pairs of supports may be employed, four pairs having been found to produce good results. Rollers 11 are mounted upon these supports, the length of each. roller being such as to extend from flange to flange, but without bindinF at the ends, so that the rollers may rotate fieely. The supports are preferably secured, as by riveting the ends,

and they also form a support for the flanges -at regular intervals about the periphery of the inner rim, a stud being provided for each pair of supports l() and rollers i1. These studs may be secured to the inner rim in any desired manner. ln the form shown they are secured by means of'screw-threads and in position to prolject each between a pair of rollers 11. Ro lers 13 are mounted on the studs. These rollers are of a diameter to so lit the space between the fianges 5 as to prop tain limited clrcumferential movement inde-l pendently each of the other.

An envelop or casing 14 surrounds the rim as a whole, includingthe outer and inner rims, and this envelop or casing may have a thickened tread 15.y This envelop may be secured in place in an desired manner, as by lacing about the spo es and inner surface of the inner rim.

It is obvious that the details of construction may be departed from to a greater or less extent without avoiding the invention, and I do not limit In self to the exact features of construction herein shown and described.

What I claim as my invention, and desire to secure by Letters Patent, is-' 1. An outer rim having oppositely-disposed integral flanges, an inner rlm less indiameter than the space bounded by said flanges, springs arranged between the outer extending in pairs from the inner rim into the space between the flanges and between the pairs of supports.

2, An inner rim, an 'outer rim having oppositely-disposed integral fian es, rollersupports extending between the anges, roll-l seaseo ers mounted on the supports, springcups apl purtenant to each rim, springs with their ends located in said oups for supporting the thrust of one rim upon the other, studs secured to the inner rim, and rollers secured upon said studs and iitting the space between the {ianges and projecting between the horizontally-dlsposed rollers.

3. An outerrim having oppositely-disposed integral flan. iges, an inner rim' less in diameter than the space bounded by said iianges, springs arranged between the outer and inner rims, supports extending in pairs between saidflanges, and studs extending through the inner rim and secured thereto by interengaging screw-threaded' surfaces and projecting into the space between the flanges and between the pairs of supports.

4. An inner rim, an outer rim having oppositely-disposed integral flanges, roller-supports extending between the lianges, rollers mounted on the supports, spring-cups agurtenant to each rim, springs with their en s ocated in said cups for supporting the thrust of one rim upon the other, studs passed through the inner rim and secured therein by interengaging screw-threads, and rollers secured upon said studs and fitting the space between the flanges and pro'ecting between the horizontally-disposed rol ers.

HERBERT S.` PULLMAN.

Witnesses:

EDWIN C. DIoKENsoN, LENA E. BERKovrroH. 

